Question about 2003 GMC Yukon Denali

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2003 yukon big motor oil pressure gage drop to o message and alarm goes off Oil level ok.has done this in past and quits.

Replaced senson a couple of weeks back. Worked fine til today. Oil Gague stays just below 40 (mid Mark on Gague) When idleing shows lower

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  • GMC Master
  • 3,103 Answers

If the guage is unreliable and its the only one that is, may switch to an aftermarket separate oil pressure guage that mounts elsewhere and be done with the situation entirely..these run around 25 bucks and its time to install and it wont fail like electronic ones do...

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

dcramer531
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SOURCE: 2003 yukon xl oil pressure gauge bouncing back and

Your oil pressure sending unit may be damaged or wearing out. You need to get the pressure affirmed so that you don't destroy your engine, but if you get a new sending unit and the pressure returns to normal you should be good to go. Thats the cheapeast way to go is to get a new sending unit and change it out or you can get the pressure verified by a mechanic which will charge for labor and then you may have to get a new unit anyway so the cost of just swapping the unit is less than a mechanic and the results will yield the same information. If the new unit does not settle the issue then you have some delivery problem either with your pump or a blockage of some sort.

Posted on Sep 16, 2011

Molson02536
  • 3854 Answers

SOURCE: 1995 GMC Sierra z71 oil pressure dropped- need advice on this

The oil pump is in the oil pan and needs to be dropped and being a 4WD you also need to drop the front axle pumpkin to remove the oil pan and replace all the gasket needed. Start with the easy and replace the oil pressure sending unit, it's on the back of the engine to the passenger side of the distributor. You can go to Auto Zone and pick up a new Oil sending unit, just make sure your get the right one, "Sending Unit" Looks the same are the oil pressure sensor but the unit reads the pressure, the other just signal a light to go on and off. It's an easy fix like replacing a spark plug. 

Posted on Jun 29, 2009

  • 1 Answer

SOURCE: Speed Odometer and Oil Gauge Drops

GMC yukons are notorious for gauge malfunctions, there are recalls for some models
However, if you have recently changed your battery this problem can occur and will take some driving time 30 min-60 min for the computer to fully reset.

Posted on Jan 20, 2009

  • 7353 Answers

SOURCE: 2006 Yukon Denali, oil pressure gauge malfunction

Most likely the oil pressure sensor is bad. Its located in the very rear of engine on top of bell housing area.

Posted on Oct 30, 2009

  • 1 Answer

SOURCE: My oil pressure gage just drops to 0!!!

My Envoy does the same thing..Had the sender replaced last winter when it was doing it. Went all summer with perfect pressure and as soon as the outside temp hit <30 degrees the pressure is dropping again..Curious as to why every time the temp gets below 30 I keep having this issue. If I shut the car off and turn it right back on it jumps to normal stays for a while then drops, shut it off and right back on (no wait) goes back to normal...Only when cold outside.... Confused!

Posted on Jan 07, 2010

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Related Questions:

1 Answer

MY 97 yukon has Rough idle, loud knocking at high torque, and oil pressure goes from 40psi to 0psi. what do you think is the problem?


Checking oil level won't tell you anything

You need to put a mechanical gauge on
the motor,you can't go by the dash for accuracy

You could have many things that need to be
done preventative maintenance wise before
you even start to diagnose the couple of current
issues

Dash Check Lights?
Codes?
Driven for two years & never worked on?

We can't guess,you need a repair shop to
give you the solution

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You should check and make sure that you oil level is full. Or make sure that its not past time for an oil change bcause if its past or time the oil is all broken down and thin and the oil pump gage says theres no pressure

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The check gages light comes on and off while driving, at the same time, the oil pressure gage drops and then bounces back up after hitting zero


There a couple of possibilities; you could have an intermittent oil pressure switch or an intermittent stepper motor in the instrument cluster. The stepper motor drives the gauge.

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1 Answer

I have a 2004 Yukon Denali. The oil pressure gage decreases when I make a full stop. When the car is running, the oil pressure gage goes up very slowly. I am wondering if anyone has experienced similar...


Your oil pressure will flucuate with the rpm of your engine. It is generally higher also when the engine is cold as the oil is thicker. This is normal as long as your oil pressure stay in the normal operatting range.

May 09, 2011 | 2003 GMC Yukon Denali

1 Answer

CHANGED MY OIL BECAUSE GAGE WAS READING LOW OIL PRESSURE AND I HAD NO OIL LIFE, TRIED TO RESET OIL LIFE TO 100%, WHICH I DID BUT ON MY DASH ITS STILL READING LOW OIL PRESSURE AND THE GAGE GOES BACK AND...


you either have a faulty oil pressure switch or you have poor oil pressure.if you find the oil pressure switch remove it and install a manuel oil pressure guage there. then you will see if it is the actual oil pressure weak or if it is the switch.

Jan 09, 2011 | 2003 GMC Yukon XL

1 Answer

The "Check Gages" light comes on all the time now.


The "check gages" light comes on in response to the oil pressure (not oil level) gage dropping too low. Step one is to check to make sure the engine has oil pressure. Use a mechanical gage inserted directly into the engine when the oil pressure sensor screws in. If the pressure is good, you need to check the gage. Your dealer has a tool that attaches to the connector from the pressure switch that gose to the gage. He can then test the gage, cluster and circuit wiring. If that is ok the culprit is the oil pressure sensor itself. I normally don't recommend replacing parts without a proper diagnosis but an oil pressure switch is relatively inexpensive. You might want to try that first. It's relatively common anf if that's the culprit, you will save a bunch of $$$ no having to go to your dealer. If you still have a problem, you have at least eliminated one item and are only out a couple of bucks.

Nov 22, 2010 | 2000 Dodge Durango

1 Answer

Gages


Yoyu dont mention the mileage on your Yukon but low oil pressure will indeed light the CES light when it reachs o psi. Have you checked your oil? Have you changed your oil and filter. High mileage and poorly maintained motors will eventually wear out and develope low oil pressure. A tempary cure would be to use a higher weight oil 20w50 will get a few more miles out of the old gal if indeed the cam, main or rod bearings have reached their service limit.. Good luck

Jun 24, 2009 | 1999 GMC Yukon

3 Answers

Low oil pressure indicator at low rpms (idle) '97 olds V8


Thicker oil is all you need. 5w30 is too thin when it warms up and the sensor cant pick up the flow going past. 10w40 should stop all the issues

Jul 07, 2008 | 1997 Oldsmobile Aurora

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